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KatRina [158]
2 years ago
10

A chemical change always involves a change to the --- of matter

Chemistry
1 answer:
faltersainse [42]2 years ago
3 0
Chemical composition.
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P=18000000/6 zeros. not sure how to do rest

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3 years ago
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The experimental group is the group that is left alone during the experiment
Paladinen [302]

Answer:

The given statement is false.

Explanation:

  • A common method of experimentation that is used to collect data on hypotheses of end up causing-effect is a contrast between two groups.
  • One community, the experimental group, is receiving medication for having any result. Some other group becomes left exposed, the control group, whether creating a different treatment.
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Gunther needs a 75% concentrated solution. When making his solution at room temperature, he could only make a
Rzqust [24]

Heat the solution to dissolve the solute

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3 years ago
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Which of these best describes heat transfer through conduction?
kozerog [31]

I'd go for D here. It also fits in with the idea of thermal expansion - as something is heated up, molecules vibrate and maybe collide. they vibrate with bigger amplitudes, so taking up more space, so expanding. maybe



4 0
3 years ago
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How many g of MgCO3(s) are needed to make 1.2 L of 1.5 M MgCl2(aq) solution?
maw [93]
Molar mass of MgCO3 is 84.313 g/mol
You can calculate this from data on the periodic table:
Molar mass Mg = 24.305g/mol
molar mass C = 12.011g/mol
molar mass O = 15.999g/mol mass 3 mol = 47.997g
Total = 84.313g/mol

Mass to be used in 1.2L of 1.5M solution = 84.313g * 1.2L * 1.5mol /L = 151.763g
I have not taken significant figures into account
The balanced equation you provide is not necessary in this calculation
4 0
2 years ago
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